*4.3. Assessment of Concentration Distribution*

The significance of Brownian motion *N*1 on concentration profile *ζ*(*η*) is displayed in Figure 9. It is observed from the sketch that larger values of *N*1 fluid concentration reduce far away from the surface and vanish after *η* ≥ 5. On the other side, it increases near the surface. This is due to the existence of slip mechanisms of fluid particles, which influence the hydrodynamic and thermal bounce. Hence, the presence of this terminology does not have significant impact on flow concentration. Further, both thermophoresis parameter *N*2 and Lewis number *Le* show increasing impact for concentration profiles (see Figures 10 and 11). The improvement in fluid concentration profile via Lewis number *Le*

is due to the fact that it is characterized by fluid flows where simultaneously mass and heat transport are involved. Therefore, an improvement is found in fluid concentration.

**Figure 10.** Influence of *N*2 on concentration field.

**Figure 11.** Influence of *Le* on concentration field.
